Talk to Chris Langton at Samoa Air (I think it is called)
Chris is a nice guy, flew with him about 20 years ago.
He owns/operates the operation so if he can't give you any work he might be able to give you some advice..
There is no GA to speak of, the Polynesian jet operation has gone and they operate an otter? Not sure what is over in Pago these days, have not landed there since about 2009/10, but seem to recall there was a D228 but it is a long time in Island aviation!
Good luck.
Not sure where the good places are to live these days, I would look up the Mountain past Robert Louis Stevensons place at Vailima